Bug 1739867 - Broken support in libdnf of zchunk metadata after rebuilt for librepo 1.10.5
Summary: Broken support in libdnf of zchunk metadata after rebuilt for librepo 1.10.5
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: libdnf
Version: 30
Hardware: All
OS: Unspecified
medium
high
Target Milestone: ---
Assignee: rpm-software-management
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-08-11 11:38 UTC by Ihor
Modified: 2019-09-20 01:57 UTC (History)
11 users (show)

Fixed In Version: libdnf-0.35.2-4.fc30 libdnf-0.35.3-5.fc31
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-09-19 01:30:59 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Ihor 2019-08-11 11:38:29 UTC
Description of problem:
After updating to libdnf-0.35.1-3.fc30.x86_64 all repositories with zchunk metadata were redownloaded with gz/xz-format metadata. 

Complain in log file /var/log/dnf.librepo.log:
2019-08-11T09:33:32Z DEBUG lr_yum_use_local: Cache directory not set, disabling zchunk

Version-Release number of selected component (if applicable):
libdnf-0.35.1-3.fc30.x86_64

How reproducible:
Always.

Steps to Reproduce:
1. Check that zchunk is enabled: dnf config-manager -- dump | grep zchunk
2. Update from libdnf-0.35.1-2.fc30.x86_64 to libdnf-0.35.1-3.fc30.x86_64.
3. Refresh metadata with command like: dnf --refresh makecache.

Actual results:
All repositories with zchunk metadata are refreshed with xz/gz metadata.

Expected results:
zchunk metadata should be preserved.

Additional info:
Replacing /usr/lib64/libdnf.so.2 from libdnf-0.35.1-2.fc30.x86_64 returned back zchunk metadata. Some config was changed in librepo for  servers that doesn't support zchunk and need to be applied to libdnf.

Comment 1 Michal Domonkos 2019-08-12 11:44:20 UTC
It appears that we don't properly enable zchunk support when building librepo on fedora:
https://github.com/rpm-software-management/librepo/blob/385e2ced1083cac0bcb19e30500311f6923e6dfc/librepo.spec#L131

This requires a closer look, however.  Marking as Triaged for now.

Comment 2 Michal Domonkos 2019-08-12 11:54:47 UTC
So it seems the conditional behaves exactly the opposite way; it defines WITH_ZCHUNK (with the OFF value being irrelevant here) which is then checked here:
https://github.com/rpm-software-management/librepo/pull/156/files

Comment 3 Jonathan Dieter 2019-08-24 15:07:09 UTC
So, what's happening is that this header in the last comment is provided by librepo, but libdnf doesn't set WITH_ZCHUNK when building, so the conditional isn't actually being set when libdnf is built.  Here's a PR to fix it in libdnf:
https://github.com/rpm-software-management/libdnf/pull/777

And here are PRs to pull in the fix into the current F30, F31 and Rawhide packages:
https://src.fedoraproject.org/rpms/libdnf/pull-request/4 - Rawhide
https://src.fedoraproject.org/rpms/libdnf/pull-request/5 - F31
https://src.fedoraproject.org/rpms/libdnf/pull-request/6 - F30

Comment 4 Jonathan Dieter 2019-08-24 15:09:24 UTC
I've tested the fix on my F30 system, and have done scratch builds in F30 and Rawhide, so I don't anticipate any problems with the fix

Comment 5 Fedora Update System 2019-09-16 06:48:41 UTC
FEDORA-2019-fb54fb2b81 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-fb54fb2b81

Comment 6 Fedora Update System 2019-09-16 06:48:41 UTC
FEDORA-2019-7d72d1e7a5 has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-7d72d1e7a5

Comment 7 Fedora Update System 2019-09-17 02:10:01 UTC
libdnf-0.35.2-4.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-fb54fb2b81

Comment 8 Fedora Update System 2019-09-17 02:14:02 UTC
libdnf-0.35.3-5.fc31 has been pushed to the Fedora 31 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-7d72d1e7a5

Comment 9 Fedora Update System 2019-09-19 01:30:59 UTC
libdnf-0.35.2-4.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2019-09-20 01:57:49 UTC
libdnf-0.35.3-5.fc31 has been pushed to the Fedora 31 stable repository. If problems still persist, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.